> > select ( select max(c.idrow)+1 from provasql c ) , 'This is only a test';
Does changing "max(c.idrow)+1" to "coalesce(max(c.idrow),0)+1" solve your problem? --Pete On Fri, Nov 04, 2005 at 04:56:26PM +0100, AESYS S.p.A. [Enzo Arlati] wrote: > > > For a while my application should support both mysql 4 and 5 ( teh same copy > on different sites of course ) so I should keep using a soluting wich should > works well on both revision. > I also have a couple of server with their database configured as master > slave, so I don't trust to use autoincrement. > When I can leave ther revision 4 at all I think to use the autoincrement > using a trigger and mybe something like the oracle sequence . > > regards, Enzo > > > Mysql 5 is much more picky on things you shouldnt have been able to do in > the > first place.. Just change idrow to auto_increment and stop doing max.. Its > not needed. innodb properly handles auto_increment now. > > Jeff > > -----Messaggio originale----- > Da: Jeff Smelser [mailto:[EMAIL PROTECTED] > Inviato: venerd? 4 novembre 2005 16.42 > A: mysql@lists.mysql.com > Oggetto: Re: MySQL 5.0 : error using max(idrow) on a null value > > > On Friday 04 November 2005 07:30 am, AESYS S.p.A. [Enzo Arlati] wrote: > > Hi, I'm trying to migrate from MySQL 4.1.11 to MySQL 5.0 and I get a > > problem with the new release. > > I have this table... > > > > provasql > > CREATE TABLE `provasql` > > > > `idrow` bigint(20) unsigned NOT NULL default '0', > > `descr` varchar(50) default NULL, > > PRIMARY KEY (`idrow`) > > ) ENGINE=InnoDB DEFAULT CHARSET=latin1 > > > > > > ...this is the SQL command... > > > > insert into provasql ( idrow, descr ) > > select ( select max(c.idrow)+1 from provasql c ) , 'This is only a test'; > > > > > > ...and this is the error: > > > > ERROR 1263 (22004): Column set to default value; NULL supplied to NOT NULL > > colum > > n 'idrow' at row 1 > > > > > > With MySQL 4.1.11 I'd never get this error message, but it happens with > the > > 5.0.15 version. > > Can anyone help me? > > Mysql 5 is much more picky on things you shouldnt have been able to do in > the > first place.. Just change idrow to auto_increment and stop doing max.. Its > not needed. innodb properly handles auto_increment now. > > Jeff > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED] > > -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
